Collapsible knockdown camp stove



2. D. TALLMAN. COLLAPSIBLE KNOCKDOWN CAM-P STOVE. APPLICATION men JUNE 15, 1920.

1,411,596. Patented Apr. 4, 1922.

"Junmw 1N VEN TOR WITNESS Z; ATTORNEYS UNITED STATES RATENT OFFICE..

ZACH'IJ. TALLMAN, 0F OAKLAND; CALIFQRNIA.-

GOLLAPSIBLE KNOCKDOWN CAMP STOVE.

' Application filed June 15;

To all wi'zmn: it may concern:

Be it known that I, Zaon D. ilianmmiv a citizen. of the United States, and resident of the city of Oakland, county of rtlameda and State ofCalifornia, have invented a new and useful Improvement in Collapsible Knockdown Camp Stoves, of which the following is a specification. 'i

This inventionirelates to stoves and more particularly to camp stoves of the portable character.

It is an object of the present invention to provide an improved camp stove consisting of a plurality of elements'that are of extremely simple 'constiuctionand of light weight and which (an be packed in very compact relation when the stove is knocked down.

A further object of the invention is to provide, in a knock-down, collapsible stove, as fen different elements asis practicable and to provide as many duplicate'and interchangeable elements as possible for the facile securing of the parts in embled stove/ forming position and, in this connection, it is a further object to provide elements that are not only duplicate and, therefore, interchangcable. but are also reversible in their several relations and positions; therefore lending greatly toward the rapidity, ease, and conveniencewith which the elements may beassembled to form the stove and alsoenabling renewal and replacement by the simple ordering of a worn or lost element that can be readily utilized in either of two possible positions and in whichpositions the said elements may be reversed.

a fi'irther object of the invention is to providen collapsible knock-down stove structure in which the elements are constructed i and arranged with permanent or rigid respective means on each to interlock with complementary means on other elements" withoutthe requirement of any loose, and therefore loseable and extraneous parts.

It is another objectjof the invention to provide details of arrangement and con struction such that will insure the proper assembly ofthe stove elements in onl'y'one and the correct position and which .will'be substantially fool proof in construction and that can be assembled without the exercise of expert knowledge and without .the re quirement of any tools.

A further object is to provide a stove structure having a plane unobstructed top,

Specification of Letters Patent.

1920. Serial No. 389,205.

The invention possesses other objects and H features of advantagasome of which. with a 1 i a 4 the Ioregoing, will be made manifest in the following description of the preferred form.

of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood" that it'is not intendedto limit the invention to the embodiment shown by the said drawings and description as variations may be adopted within: the scope of the invention as set forth in the claims.

.lieferring to said drawings: Figure l'is a perspective of-the assembled stove with apart of the smoke stack broken away and also having a part of the cover broken away to show the interior 7 of the re -enforcing means.

Figure 2 is a. central longitudinal vertical section through the stove. i y

Figure 3 is asection on line 3-8 illustrating the interlocking structure in substantially full size with the parts broken Patented Apr. 4; 1922.

away and contracted for thepurpose of conserving space in the drawing.

Figure 4 is a perspectiveof the lower portion of the assembled smoke stack and with the bottom plate thereof in position to be attached to the lower end of the stack.

Figure '5 is a detail sectional view on a slightly larger scale than Fig. 2, illustratingmore clearly the position of the parts at the back upper portion of the stove and at the bottom of the stack. I

Figure 6 is a sectional detail on a horizontal plane through the front corner of the stove at about a line indicated at 6-6 on Fig. 1.

Figure 7 is a perspective of a corner ofone of the elements of the stove.

Figure 8 is a perspective of a corner of another element of the stove. Q

FilgureS) is a perspective of'a form of reenforcing element for the top of the stove. The Invention is incorporated preferably in a type'of stove having plane elements of sheet metal having the propertyfof well withstanding the effects of heat so as to provide a stove of durable construction and the form of stove as illustrated is substantially that of a rectangular or oblong box without a bot-tomes the stove may be erected immediately above or on anon-combustible surface, such as earth or'stone, as maybe convenient.

theoutlet opening in the back. Further, t

element4 of the stove. in Figs. 6 and 7, the front member 3 and the The stove of the invention is provided with substantially duplicate longitudinal side members and with front and back members or elements of substantially equal area and similar in construction except that the front element is provided with a door for the admission of fuel and the rear element 1s provided with an outlet opening for circulation of air while a unitary top is included that is adapted to be applicable to and snugly fitupon the frame'formed by the assembled and interconnected side to the back and front'elements. Further in order to promote combastion for the eliicient burning of fuel in the stove, acollapsible stack structure'is provided and is ap licable to the back element of the stove an is designed to provide for the outlet of fumes of combustion througlh e invention involves a stove, the elements of which are provided with rigid or permanent, and preferably integral, interlocking means, thereby eliminating the requirement of ex traneous fastenings that not only may be lost but that are usually soon rendered either o erative entirely or serviceable only with fli culty in the assembling of the parts.

In the form of the stove illustrated, substantially duplicate side elements 2 are made of sheet metal such as black iron, these sides bein shown as oblong and plane, and ma be 0 any roportion and weight of materia The end e ges of the side elements or panels 2 are, as is clearlyrshown in Fig. 8, provided with inwardly turned flanges 2 forming hooks to be interlocked with complementary means on the. front element 3 and the back As shown in detail back member 4 are respectively provided along their transverse edges with flanges 3 and 4" standing substantially perpendicular to the plane bodies of the front and back ele ments and the flanges 3 and 49* are them- These interlockin selvesprovided with inturned hook-forming portions 3 and 4F, these portions forming strips or flanges extending parallel to and spaced sufliciently from their respective flanges 3 and 4 to provide for the telescopic insertion of the hook-forming flanges 2 on the ends of the respective side panels 2 in a manner clearly shown in Fig. 6. Thus, it

will be seen that the framework of the stove willconsist of the side anels 2' to the. front ends of which are detac ably interlocked by the telescopic flanges or hook-like means 2' and 3", the front and rear elements 3-4. means are, therefore, formed permanent y and, in the case shown, rigidly withthe front and side elements and. therefore, cannot be lost and will always 0 erate to readily telescope one within t e other by the endwise insertion of the one element or member on the other until the to edges of the frame-forming element, and

also the bottom edges, are brought into flush position or into a common plane. To facihtate the endwise insertion of the interlocking means, one within the other, the corners of the hook-forming means are preferably removed as, for instance, the corners of the hoolnforming flanges 2 of the side members 2 are beveled olf inwardly as at 5 and, in the same manner, the flange 4' and the hookforming part 4 of the back 4 are beveled off at 6 as is also thecorresponding portions on the front 3, so that there will be no sharp corners to become bent over or to make difficult the insertion of the interlocking hook portions. a

The front 3 is provided with a suitable door-way or opening 7 that may be covered by the door 8 hinged, or otherwise suitably connected, as at 9, to one side of the door-- way 7 and the door may be secured in closed position by a simple latch 10, pivotally connected to the door 8 and adapted to be interengaged with a keeper l1 fixed on the outer face of the front 3, To provide for the ad mission of fresh air into the stove, suitable damper or inlet meansis provided, in the present case including a damper 12 adjustably mounted over a damper opening 13 provided in thedoor 8. j

The framework is rigidly secured in an upright and proper angular relation as between the front and side elements by the application to the top edges of the frame elements of a cover or top 14 formed referably of sheet met-a1 and shown as of oblong outline, the edges of the top having downturned flanges 15 to overhang the to edges of the sides and from the back and t ese top edges of these elements are preferabl I'B-BIIfOI'CQd by overturning and ressing own a re-enforcing, longitudinal y extending flange portion.16.

To provide for the eflicient combustion of fuel within the stove chamber, a smoke stack 15 provided andis constructed of a set of strips of suitable length, width, and weightof material, and the stack consistsof front and back members 17 and 18 that are shown as provided along their longitudinal edges wit inturned hook-forming flanges 19 similar to those above described on the front and back elements of the stove frame. These hook elementsare adapted to telescopically interengage complementary hook flanges 20 outwardly turned. on substantially duplicate side forming strips 21 of the smoke stack. The side strips 21 and the back strip 18 are of substantially equal length and each has at its lower transverse edge an out-turned flange 22 that is Vdesigned to be embraced'by the complementary flange 23 provided on a bottom plate 24 adapted to be shifted by movement in the direction of the arrow, Fig. 4, on to the flanges 22 of the stack strips when they are assembled.

The front stack strip or section 17 is provided with a transverse outwardly turned flange l7 on its lower edge that is adapted to rest upon the top 14; or" the stove when the stack is adjusted in position, as clearly shown in Figs. 1 and 2.

The lower portions of the side edges of the front stack section 17 are turned inwardly at 25, as indicated in dotted lines in Fig. 4, thus interrupting the length of the interlccking hooks 2O somewhat above the bottom flanges 22. These inwardly turned flanges 25 are designed to interlock with overturned hookl'orming flanges 26, Fig. 5, "formed on the vertical edges of an outlet opening 27 form-ed in the upper portion of the back 4 through which opening may escape products of combustion from the stove chamber. The interlocking of the flanges 25 with the hook- ;torming flanges 26 serves to hold the stack assembly in position securely upon the back 4 and the downward movement of the stack is limited in an assembly of the stove by reason of the engagement of the bottom 24 ot the stack with an outturned flange 28 at-the bottom of the outlet opening 27.

From the above, it will be seen that the stack elements are interlocked to each other securely yet removably by means of the interengaging hook-forming flanges without the use of extraneous fastening means.

Since it is desirable to construct the top 142 of light but durable material and as it may be subjected to considerable weight when utensils and the contents thereof are applied, the top is preferably re-entorced and this may be accomplished efliciently by the attachment to the under side thereot of braces or re-entorcing strips 30. Lightness and yet rigidity of structure may be secured by forming these re-entorcing strips 30 in the shape of channel pieces having outer flanges 31 which in turn are inwardly and upwardly folded, as at 32, thus providing double parallel and re-enforcing strips which are further strengthened by the fold portion 33 connecting the flanges 31 and 32 of the respective sides.

The stove as thus constructed and built is capable of being readily knocked down and all of the collapsed parts compactly assembled one upon the other to occupy a l1lll1imum space when the parts are to be packed away, either for storage or tlztDSPOl'l'atlOll, especially in cases when the stove is utilized for automobile, camping and yachting purposes.

Nhat is claimed is:

1. A. knock-down camp stove having a box formed of sheet material elements including sides, front and back pieces and a plane top, the back having a vent opening; and smokestack forming pieces adapted to be asembled and interlocked on the back and form a flue registering with the vent opening, leaving the top unobstructed; the stack pieces having telescopic, hook-forming, longitudinal flanges, and a bottom closure attachable to the lower end of the stack and holding the stack rigid.

2. A knock-clown camp stove having a box formed of sheet material elements including sides, front and back pieces and a plane top, the back having a vent opening with side hooks and a bottom stop flange; and smokestack forming pieces adapted to be assembled and interlocked on the back hooks and form a. flue registering with the vent opening, leaving the top unobstructed; and a bottom plate for the stack for defining the position of the stack as it is applied on the stop flange.

In testimony whereof, I have hereunto set my hand.

ZACH D. TALLMAN. 

